Stimulation of pine oleoresin flow by fungus inoculation

Abstract

Since the early 1930’s it has been known that application of certain chemicals to tapping surfaces on pine trees will stimulate the flow of oleoresin, and industrial use of a 50% sulphuric acid spray for this purpose is increasing. Now, investigations, discussed here, indicate that some stimulation may be achieved by inoculation with a fungus.

Keywords

Bark Economic Botany Fungus Inoculation Cumulative Yield Pitch Canker

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The author expresses his appreciation for the advice and guidance given by Dr. George H. Hepting, under whose direction this work was conducted in cooperation with the Southeastern Forest Experiment Station. Lake City, Florida; for the assistance and unpublished data furnished by Dr. R. P. True; and for the assistance of Mr. Milton M. Smucker in preparing the trees used in the tests.